A compound selected from: Ac-Arg-c (Cys-D-Ala-His-D-2-Nal-Arg-Trp-Cys) -NH2 (SEQ ID NO: 49) Ac-Nle-c (Cys-D- Ala-His-D-Phe-Arg-Trp-Pen) -NH2 (SEQ ID NO: 22) Ac-Arg-c (Cys-D-Ala-His-D-Phe-Arg-Trp-Pen) -NH2 ( SEQ ID NO: 51) Ac-D-Arg-c (Cys-D-Ala-His-D-Phe-Arg-Trp-Pen) -NH2 (SEQ ID NO: 51) Ac-Nle-c (Cys-D -Ala-His-D-Phe-Arg-Trp-Cys) -NH2 (SEQ ID NO: 7) Ac-D-Arg-c (Cys-D-Ala-His-D-Phe-Arg-Trp-Cys) -NH2 (SEQ ID NO: 50) or a pharmaceutically acceptable salt thereof.Un compuesto seleccionado de: Ac-Arg-c(Cys-D-Ala-His-D-2-Nal-Arg-Trp-Cys)-NH2 (SEQ ID NO: 49) Ac-Nle-c(Cys-D-Ala-His-D-Phe-Arg-Trp-Pen)-NH2 (SEQ ID NO: 22) Ac-Arg-c(Cys-D-Ala-His-D-Phe-Arg-Trp-Pen)-NH2 (SEQ ID NO: 51) Ac-D-Arg-c(Cys-D-Ala-His-D-Phe-Arg-Trp-Pen)-NH2 (SEQ ID NO: 51) Ac-Nle-c(Cys-D-Ala-His-D-Phe-Arg-Trp-Cys)-NH2 (SEQ ID NO: 7) Ac-D-Arg-c(Cys-D-Ala-His-D-Phe-Arg-Trp-Cys)-NH2 (SEQ ID NO: 50) o una sal farmacéuticamente aceptable del mismo.
